Iterating over two arrays simultaneously using for each loop in Java

Question

Student\'s names(String[]) and corresponding marks(int[]) are stored in different arrays.

How may I iterate over both arrays together using for each loop in Java ? <

Answer 1

You need to do it using the regular for loop with an index, like this:

if (marks.length != studentNames.length) {
    ... // Something is wrong!
}
// This assumes that studentNames and marks have identical lengths
for (int i = 0 ; i != marks.length ; i++) {
    System.out.println(studentNames[i]);
    System.out.println(marks[i]);
}

A better approach would be using a class to store a student along with his/her marks, like this:

class StudentMark {
    private String name;
    private int mark;
    public StudentMark(String n, int m) {name=n; mark=m; }
    public String getName() {return name;}
    public int getMark() {return mark;}
}

for (StudentMark sm : arrayOfStudentsAndTheirMarks) {
    System.out.println(sm.getName());
    System.out.println(sm.getMark());
}